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| package org.sat4j.minisat.constraints.card; |
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| import java.io.Serializable; |
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| import org.sat4j.minisat.core.Constr; |
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| import org.sat4j.minisat.core.ILits; |
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| import org.sat4j.minisat.core.Undoable; |
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| import org.sat4j.minisat.core.UnitPropagationListener; |
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| import org.sat4j.specs.ContradictionException; |
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| import org.sat4j.specs.IVecInt; |
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| public class AtLeast implements Constr, Undoable, Serializable { |
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| private static final long serialVersionUID = 1L; |
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| private int n; |
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| private int counter; |
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| private final int[] lits; |
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| private final ILits voc; |
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252740
| private AtLeast(ILits voc, IVecInt ps, int n) {
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252740
| this.n = ps.size() - n;
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252740
| this.voc = voc;
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252740
| counter = 0;
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252740
| lits = new int[ps.size()];
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252740
| ps.moveTo(lits);
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252740
| for (int q : lits) {
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822293
| voc.watch(q ^ 1, this);
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| } |
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| } |
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252817
| public static AtLeast atLeastNew(UnitPropagationListener s, ILits voc,
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| IVecInt ps, int n) throws ContradictionException { |
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252817
| if (ps.size() < n)
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40
| throw new ContradictionException();
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252777
| int degree = n;
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252777
| for (int i = 0; i < ps.size();) {
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823112
| if (!voc.isUnassigned(ps.get(i))) {
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327
| if (voc.isSatisfied(ps.get(i))) {
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153
| degree--;
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| } |
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| ps.delete(i);
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| } else { |
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822785
| i++;
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| } |
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| } |
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252777
| ps.sortUnique();
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252777
| for (int i = 0; i < ps.size() - 1;) {
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570008
| if (ps.get(i) == (ps.get(i + 1) ^ 1)) {
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| i++;
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| } else { |
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569995
| i++;
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| } |
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| } |
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252777
| if (ps.size() == degree) {
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22
| for (int i = 0; i < ps.size(); i++) {
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387
| if (!s.enqueue(ps.get(i))) {
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0
| throw new ContradictionException();
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| } |
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| } |
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| return null;
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| } |
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252755
| if (ps.size() < degree)
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15
| throw new ContradictionException();
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252740
| if (degree == 0)
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0
| return null;
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252740
| return new AtLeast(voc, ps, degree);
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| } |
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0
| public void remove() {
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147 |
0
| for (int q : lits) {
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148 |
0
| voc.watches(q ^ 1).remove(this);
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| } |
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| } |
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339525105
| public boolean propagate(UnitPropagationListener s, int p) {
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339525105
| voc.watch(p, this);
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339525105
| if (counter == n)
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12806131
| return false;
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326718974
| counter++;
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326718974
| voc.undos(p).push(this);
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326718974
| if (counter == n)
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205808821
| for (int q : lits) {
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1092700953
| if (voc.isUnassigned(q)) {
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251829038
| if (!s.enqueue(q, this)) {
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0
| return false;
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| } |
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| } |
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| } |
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326718974
| return true;
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| } |
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458488
| public boolean simplify() {
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458488
| return false;
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| } |
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326679697
| public void undo(int p) {
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326679697
| counter--;
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| } |
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117977943
| public void calcReason(int p, IVecInt outReason) {
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117977943
| for (int q : lits) {
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960506479
| if (voc.isFalsified(q)) {
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419471597
| outReason.push(q ^ 1);
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| } |
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| } |
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| } |
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117977943
| public boolean learnt() {
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117977943
| return false;
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| } |
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0
| public double getActivity() {
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0
| return 0;
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| } |
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0
| public void incActivity(double claInc) {
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| } |
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0
| public boolean locked() {
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0
| return true;
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| } |
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249 |
0
| public void setLearnt() {
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250 |
0
| throw new UnsupportedOperationException();
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| } |
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252 |
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253 |
0
| public void register() {
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254 |
0
| throw new UnsupportedOperationException();
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| } |
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256 |
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257 |
0
| public int size() {
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258 |
0
| return lits.length;
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259 |
| } |
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260 |
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261 |
0
| public int get(int i) {
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262 |
0
| return lits[i];
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263 |
| } |
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264 |
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265 |
0
| public void rescaleBy(double d) {
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266 |
0
| throw new UnsupportedOperationException();
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| } |
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268 |
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269 |
0
| public void assertConstraint(UnitPropagationListener s) {
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270 |
0
| throw new UnsupportedOperationException();
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271 |
| } |
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272 |
| } |